/******************************************************************************* | |
* Copyright (c) 2001 International Business Machines Corp. and others. | |
* All rights reserved. This program and the accompanying materials | |
* are made available under the terms of the Common Public License v0.5 | |
* which accompanies this distribution, and is available at | |
* http://www.eclipse.org/legal/cpl-v05.html | |
* | |
* Contributors: | |
* IBM Corporation - initial API and implementation | |
******************************************************************************/ | |
package org.eclipse.jdt.core.dom; | |
/** | |
* Import declaration AST node type. | |
* | |
* <pre> | |
* ImportDeclaration: | |
* <b>import</b> Name [ <b>.</b> <b>*</b> ] <b>;</b> | |
* </pre> | |
* | |
* @since 2.0 | |
*/ | |
public class ImportDeclaration extends ASTNode { | |
/** | |
* The import name; lazily initialized; defaults to a unspecified, | |
* legal Java identifier. | |
*/ | |
private Name importName = null; | |
/** | |
* On demand versus single type import; defaults to single type import. | |
*/ | |
private boolean onDemand = false; | |
/** | |
* Creates a new AST node for an import declaration owned by the | |
* given AST. The import declaration initially is a single type | |
* import for an unspecified, but legal, Java type name. | |
* <p> | |
* N.B. This constructor is package-private; all subclasses must be | |
* declared in the same package; clients are unable to declare | |
* additional subclasses. | |
* </p> | |
* | |
* @param ast the AST that is to own this node | |
*/ | |
ImportDeclaration(AST ast) { | |
super(ast); | |
} | |
/* (omit javadoc for this method) | |
* Method declared on ASTNode. | |
*/ | |
public int getNodeType() { | |
return IMPORT_DECLARATION; | |
} | |
/* (omit javadoc for this method) | |
* Method declared on ASTNode. | |
*/ | |
ASTNode clone(AST target) { | |
ImportDeclaration result = new ImportDeclaration(target); | |
result.setOnDemand(isOnDemand()); | |
result.setName((Name) getName().clone(target)); | |
return result; | |
} | |
/* (omit javadoc for this method) | |
* Method declared on ASTNode. | |
*/ | |
public boolean subtreeMatch(ASTMatcher matcher, Object other) { | |
// dispatch to correct overloaded match method | |
return matcher.match(this, other); | |
} | |
/* (omit javadoc for this method) | |
* Method declared on ASTNode. | |
*/ | |
void accept0(ASTVisitor visitor) { | |
boolean visitChildren = visitor.visit(this); | |
if (visitChildren) { | |
acceptChild(visitor, getName()); | |
} | |
visitor.endVisit(this); | |
} | |
/** | |
* Returns the name imported by this declaration. | |
* <p> | |
* For an on-demand import, this is the name of a package. For a | |
* single-type import, this is the qualified name of a type. | |
* </p> | |
* | |
* @return the imported name node | |
*/ | |
public Name getName() { | |
if (importName == null) { | |
// lazy initialize - use setter to ensure parent link set too | |
setName(getAST().newQualifiedName( | |
new SimpleName(getAST()), new SimpleName(getAST()))); | |
} | |
return importName; | |
} | |
/** | |
* Sets the name of this import declaration to the given name. | |
* <p> | |
* For an on-demand import, this is the name of a package. For a | |
* single-type import, this is the qualified name of a type. | |
* </p> | |
* | |
* @param name the new import name | |
* @exception IllegalArgumentException if the node belongs to a different AST | |
* @exception IllegalArgumentException if the node already has a parent | |
*/ | |
public void setName(Name name) { | |
if (name == null) { | |
throw new IllegalArgumentException(); | |
} | |
replaceChild(this.importName, name, false); | |
this.importName = name; | |
} | |
/** | |
* Returns whether this import declaration is an on-demand or a | |
* single-type import. | |
* | |
* @return <code>true</code> if this is an on-demand import, | |
* and <code>false</code> if this is a single type import | |
*/ | |
public boolean isOnDemand() { | |
return onDemand; | |
} | |
/** | |
* Sets whether this import declaration is an on-demand or a | |
* single-type import. | |
* | |
* @param onDemand <code>true</code> if this is an on-demand import, | |
* and <code>false</code> if this is a single type import | |
*/ | |
public void setOnDemand(boolean onDemand) { | |
modifying(); | |
this.onDemand = onDemand; | |
} | |
/** | |
* Resolves and returns the binding for the package or type imported by | |
* this import declaration. | |
* <p> | |
* Note that bindings are generally unavailable unless requested when the | |
* AST is being built. | |
* </p> | |
* | |
* @return the package binding (for on-demand imports) or type binding | |
* (for single-type imports), or <code>null</code> if the binding cannot | |
* be resolved | |
*/ | |
public IBinding resolveBinding() { | |
return getAST().getBindingResolver().resolveImport(this); | |
} | |
/* (omit javadoc for this method) | |
* Method declared on ASTNode. | |
*/ | |
int memSize() { | |
return BASE_NODE_SIZE + 2 * 4; | |
} | |
/* (omit javadoc for this method) | |
* Method declared on ASTNode. | |
*/ | |
int treeSize() { | |
return | |
memSize() | |
+ (importName == null ? 0 : getName().treeSize()); | |
} | |
} | |